package com.xingxuecn.demos.mybatis.mapper;

import com.xingxuecn.demos.mybatis.domain.User;

import org.apache.ibatis.annotations.Select;

/**
 * @author Kris at 2018/9/20 11:35
 */
public interface UserMapper {

    Long countUser();

    User findById(Integer id);
}
